<template>
    <div class="upload">
        <el-upload class="avatar-uploader" :action=uploadUrl :show-file-list="false" :on-success="handleAvatarSuccess"
            :before-upload="beforeAvatarUpload">
            <img v-if="imageUrl" :src="imageUrl" class="avatar">
            <i v-else class="el-icon-plus avatar-uploader-icon" />
        </el-upload>
    </div>
</template>
 
<script>
export default {
    name: "Upload",
    data() {
        return {
            imageUrl: '',
            uploadUrl: 'http://localhost:8086/common/upload',
        };
    },
    mounted() {

    },
    methods: {
        handleAvatarSuccess(res, file) {
            // 照片回显
            this.imageUrl = URL.createObjectURL(file.raw)
            this.$emit("imageName", res.data)

        },
        beforeAvatarUpload(file) {
            const isLt2M = file.size / 1024 / 1024 < 2
            if (!isLt2M) {
                this.$message.error('上传头像图片大小不能超过 2MB!')
            }
            return isLt2M
        }
    }
}
</script>
 
<style>
.avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.avatar-uploader .el-upload:hover {
    border-color: #409eff;
}

.avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    /* 未上传前的大小 */
    width: 400px;
    height: 400px;
    line-height: 400px;
    text-align: center;
}

/* 上传之后的文件大小 */
.avatar {
    width: 400px;
    height: 400px;
    display: block;
}
</style>